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Effects of temperature, body size and feeding on rates of metabolism in young‐of‐the‐year haddock
Author(s) -
Peck M. A.,
Buckley L. J.,
Bengtson D. A.
Publication year - 2005
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.0022-1112.2005.00633.x
Subject(s) - haddock , biology , zoology , juvenile , allometry , respiration , energy metabolism , metabolic rate , fish <actinopterygii> , fishery , ecology , anatomy , endocrinology
The mean rate of oxygen consumption (routine respiration rate, R R , mg O 2 fish −1 h −1 ), measured for individual or small groups of haddock Melanogrammus aeglefinus (3–12 cm standard length, L S ) maintained for 5 days within flow‐through respiratory chambers at four different temperatures, increased with increasing dry mass ( M D ). The relationship between R R and M D was allometric ( R R = α M b ) with b values of 0·631, 0·606, 0·655 and 0·650 at 5·0, 8·0, 12·0 and 15·0° C, respectively. The effect of temperature ( T ) and M D on mean R R was described by indicating a Q 10 of 2·27 between 5 and 15° C. Juvenile haddock routine metabolic scope, calculated as the ratio of the mean of highest and lowest deciles of R R measured in each chamber, significantly decreased with temperature such that the routine scope at 15° C was half that at 5° C. The cost of feeding ( R SDA ) was c . 3% of consumed food energy, a value half that found for larger gadoid juveniles and adults.